*{
    margin: 0;
    padding: 0;
}
body{
    background-color: #f5f5f5;
}
.box>:nth-child(1){
    margin-bottom: 30px;
    display: flex;
    justify-content: flex-start;
    margin-left: 150px;
    margin-top: 30px;
}
.pp{
    width: 100px;
    background-color: red;
    height: 40px;
    border-radius: 10px;
    text-align: center;
    line-height: 40px;
    font-size: 30px;
    
}
a{
    text-decoration: none;
    color: white;
}
button{
   
    width: 120px;
    height: 43px;
    color: white;
    background-color: red;
    border: none;
    border-radius: 10px;
    line-height: 40px;
    font-size: 28px;
}
.top h1{
    margin-top: 5px;
    margin-right: 20px;
    color: rgb(240, 235, 235);
}
.top p{
    margin-top: 8px;
    margin-right: 30px;
}

.left p{
    text-align: center;
    line-height: 40px;
    width: 120px;
    height: 40px;
    color: white;
    font-size: 22px;
    background-color: blue;
    border: none;
    border-radius: 10px;
    margin: 20px 0;
}
.left{
    margin-left: 50px;
    float: left;
}
.right{
    margin-top: 5px;
    margin-left:50px;
    width: 520px;
    height: 320px;
    border: 2px black solid;
    float: left;
}
h2{
    color: rgb(240, 235, 235);
}

body{
    background: url(' https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg9.51tietu.net%2Fpic%2F2019-091311%2Fwtm02aje1z4wtm02aje1z4.jpg&refer=http%3A%2F%2Fimg9.51tietu.net&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1639378391&t=950e1b2b2deb8e39064c1369445054c0')  repeat ;

    background-size: 100%;
    }
.bottom{
        margin-left: 100px;
        /* width: 1000px; */
        
}
ul,ol,li{
    list-style: none;
}
.banner{
   overflow: hidden;
    width: 100%;
    height: 100%;
    /* border: 5px solid black; */
    /* margin: 50px auto; */
    position: relative;
}
img{
    width: 100%;
    height: 100%;
    display: block;
}
ul{
    width: 500%;
    height: 100%;
    position: absolute;
}
ul li{
    width: 520px;
    height: 320px;
    float: left;
}
ol{
    height: 50px;
    position: absolute;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 30px;
    border-radius: 30px;
}
ol li{
    width: 30px;
    height: 30px;
    background-color: skyblue;
    border-radius: 50% ;
    margin: 0 20px;
}
.banner > ol > li.active{
    background: black;
}
.banner div{
    width: 100%;
    height: 50px;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.banner div a{
    color: skyblue;
    font-size: 40px;
    font-weight: 900;
    text-decoration: none;
}
a,a:hover,a:active{
    text-decoration: none;
}